Exercise Short Questions | Chapter#2 Kinematics | 9th Physics New Book | National Book Foundation

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CHAPTER#2 KINEMATICS
EXERCISE SHORT QUESTIONS
A boy moves for some time, give two situations in which his displacement is zero but covered distance is not zero?
A stone tied to string is whirling in circle, what is direction of its velocity at any instant?
Is it possible to accelerate an object without speeding it up or slowing it down?
Can a car moving towards right have direction of acceleration towards left?
With the help of daily life examples, describe the situations in which:
a. acceleration is in the direction of motion. b. acceleration is against the direction of motion.
c. acceleration is zero and body is in motion.
Examine distance-time graph of a motorcyclist (as shown), what does this graph tell us about the speed of motorcyclist? Also plot its velocity-time graph.
Which controls in the car can produce acceleration or deceleration in it?
If two stones of 10kg and 1kg are dropped from a 1km high tower. Which will hit the ground with greater velocity? Which will hit the ground first? (Neglect the air resistance)
A 100g ball is released (from rest) and another is thrown downward with velocity of 10〖ms〗^(-1), which will have greater acceleration? (Neglect the air resistance)
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